Reversing mechanism



s. CRESSEY REVERSING MECHANISM Filed April 25, 1922 2 Sheets-Sheet 1Oct. 16, 1923.

S. CRESSEY REVERSING MECHANISM Filed April 25 1.922 2 Sheets-Sheet 2Patented a. 1 6.1923.

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I nEvER-s'me MECHANISM.

Applieationfiled April 25, 192 2. seriaino. 556,495.

i To allwhom it may concern:

Be it known that I, STEVE CBiissnna citizen of the United States,residingat- San Pedro in the countyof Los Angelesand State ofCalifornia, have invented a new and useful Reversing Mechanism, of whichthefollowing-isaspecification.

} relates to reversing mech anisms and is particularly directedto arotary device providing a reverse rotation of a driven shaft. I 1 Anobject of the invention is to provide a device associated with adrivingshaft and functioning to produce a reverse rotation of a drivenshaitwithout employment of gear- This invention 'ing or friction driveelements-and which provides a positive driving connectionbet ween thedrive and driven shafts.

v Another object istoprovideia device in which the motion reversingmechanism includes crank pins, radial slides: and coin necting crankarmsarranged to avoid a dead center condition. t, A further object is toprovide a positively connected motion reversing device which ispractically noiseless and which. is strong anddurable and economical ofmanufacture. I

' Various other objects and advantages will be more fully apparent fromthe following description of the accompanyingdrawings which form a partof this disclosure, and which illustrate a preferred form of embodimentof the invention. t

, Of the drawings: I H

Fig. 1' is anelevation, partly section of m reversing device. 7 V Fig. 2is an enlarged axial section thereof.

Fig. 3 is a section on line 3- 3. of ig. 2. Fig. 4 is a section on line4-4 of Fig'QQ.

iFig. 5 isa section on line 55 of Fig. 2.

fFig, 6 is aperspectiv'e view oi one ofthe casing members, showing theslide grooves.

F ig, 7 ,is a perspective view of the lop V posed casing members.

Figs. 8' and 9 are diagr'ainmatic views il-,

lustrating the principle of Operation.

Referring pa clll rlif .1 F g w h. shows Oneadap'tatiOn the device. ofthe.

present invention, the reversing mechanism proper is contained in a;casing comprising two intermeshing casingmembers 1,2 and two end plates3, 4 all secured together by.

bolts 5, the plate 3 having a" hub 6 provided with" clutch teeth 7 andthe plate ie having .a hub S provided'withclutch teeth 9.. The

i drive "shaft 1 0 is'rotatablein the plate 3and recessed as at 28 12having clutch. teeth: 13, is .slidably keyed to the shaftldan'd may beoperated'byfa clutch lever' l l tozclutch the 1 casing to the driveshaf-tffor a dire slightly reduced diameter which is: provided withradial "grooves 21, 22, 23,. 2 merging together at the center of theboss; with the opposite grooves relatively aligned to form in. effect; acontinuous diametric: groove.

(See particularly, Figsil. and 6.) Theop; posite or outer end of thecasing member :1

a fixed bearing aiclutchielenient .7

ct, forward drive,- as I is recessed to providea-"chamber 2 5 with a.

partition- .Wall126 separating the chamber from the base of thegroovesqeThe wall 26 at the base of .each groovehas an elongated slot27, the purpose of which will be.

later explained.

.QThe inner end of the casing member 2is to a g depth corresponding tothe height ofthe, boss200f the member land theopposite orouterendrecessed to provide a chamber 29, the recess 28 chamber29 beingseparated by a. partition Wall v30, slotsSlfj. h V,

In assembling the casing,'the boss 20 of the memberl. fits, into thejrecess 28. 1? the member 2 with. the peripheral. wall of. said recess;closingf the ends "ofythe sever-al grooves and. the partition wall 30closing,

V theppen side sithereofhthe slots 31" being alignedv with and. equalinflength with the y aving four radial elongated -The, end plates 3: andthe. chain I 'bers and .29. ,;when the casing is. complete- 1yassembled; said "plates ghaving peripheral j anges 2 members. I

seaweeds ar satisfies? st-antiallyzradial direction toward and from"theaxes ofthe shaitglthat is, they travel in a direction transverse totheaxlal plane.

. the icasing'so-that each slide travels in a suboverlapping theadjacent-casing If only two slides are used their lines of travelkpreferably' intersect.

These slide members 21, 22, 23 '24 are slid'able in the respectivecompanion grooves 21, 22, 23, 24 and are provided with {transverse wristpins 21", 22 23", 24", each extending into the chamber 25 .through'one 1of the respective slots 27, and opposed relatively aligned wrist pins21?,22, 233 24 each extending in the opposite direction through one ofthe srespective"slots-31 and into the chamber 29, theywrist pins, as

shown in Fig. 2 being preferably made integral with the respective slidemembers. The slides are disposed in pairs, the individuals of each pairbeing'opposed to each -'other diametrically, V and they also jtr-avel'inopposite directions from each other at any instant. This insuresbalancing of the inertiaforces. The filine'of "travel of one ;pair .o'fslides jis preferablyat right angles to'that dfgthe other.

i The drive shaftQlO carries a'two throw j 5 crank element positioned inthe chamber and including a crank pin '33 and an opposed crank pin 34,and'the' driven shaft 15 carries @fljSlIIillaI' two .throw crankjelement-positionedin the chamber .29 and ineluding a crank pin35andan opposed crank pin36.

"Thedrivesh-aft 10 is in positive driving 23", of the 'illde 23*, a link39 connecting the opposed crank Pin- 34 with the wrist pin 24 of theslide 24:, and a companion link 40 connects the crankxpin 341: with thIn the chamber '29 are positioned other links whichjpositively connect"the slides with the driven shaft and which include a link 41 connecting"the crank pin 35 with the wrist pin 22 of the slide'22 acom-' panionlink 42 connecting the .pin 35 with the 'wristpi-n ""21 of the slide"2l'a link 4?) connecting the opposed crank pin .36

with the wrist pm 24 of the slide 24*, and a companion link 44connecting the pi1r36 a with "the wrist pin 23 of .the slide '23.

i The variousrconnections are clearly illustratedin Fig. 8, and fromanexamination of said figure-the various operations will be*fully'understodd. 'When the clutch 17 engages the casing {1 said.ca'sing ..will be held against ;rotation, and if in this in--stancetheshaft 10is "rotated in the direction fthe arrow 46 in Fig. 8the several ra 'dialslides will 'fbe reciprocated as indicated by theseveral arrows and the shaft .15 ,rotated iin .;a directionindicatedia-by the arrow 1'48 will b reverse.

to the directionofrotation of the shaft 10. If the clutch .17 isdisengaged, allowing a free rotation of the casing 1, it will be evidentthat the shaft 15 will then likewise rotate in a direction reverse tothat of the shaft 10 but at one half the speed.

Further, if the clutch 17 is disengaged and the clutch 12 engaged thecasing 1 then becomes fixed to and bodily rotatable with the shaft 10and in consequencethere isprovided' a shafts. a o

In Fig. 9. I'have illustrated the principle of the invention in itssimplest form, .this including only two radial slides at right angles toeach other and with one shaft having only a singlecrank pin. Theoperation of this simple form is the same as is that of the four slidetype, the main advantage of the four slide type residingin the'provisionof a betterbalanced ideViQG and a more uniform distribution of strainsand stresses.

Although I have herein referred to the shaft 10 being the drive shaft itwill be obviou that either shaft'can be the drive shaft" and the other,the driven shaft, and further, while the shafts are specifically shown fas having crank-pins, the term as used in the claims is intendedtoinclude such mechanical equivalents as will give a crank action. f a Itwill be'noted that in the embodiment of direct drive between the two theinvention set forth above every moving part hasfla corresponding partwhich at any instant is moving in an opposite direction to it. For thesereasons the inertia force of the cranks and slidesare balanced.

While the form of mechanism herein illustrated and described is welladapted to fulfil the objects primarily stated it istobe understood thatit is not intended to confine the invention to the embodiment hereindisclosed, for it is susceptible [of embodiment in various other formsall co mingwithin the scope of the following claims.

I claim: i 1.. In a device ofthe nature disclosed, a casing, a shafthaving a crank element, a second shaft in substantial alignment .withthe first named shaft, and having two diametrically opposed crankelements, slides carried by the casing and eachzrnovable transverselytowardsand from the axes-of the shafts, the line of movement of oneslide intersecting the line I of movement ef 7 the other slide, meansconnecting the two said diametrically opposed crank elements eachwvithone of'the slides, and meansconnecting the crank element of the firstshaft with both slides. I I r 2. In a device of the nature disclosed,afcasi'ng, a shaftfhaving crank-pin, a second shaft 'in substantialztlignrnent with h fir sha ta d having; wod am trieal y opposed crankpins, two slidesacarrifed by the. casing and each movable transverselytowards and from the axes of the shafts,the

line of movement of one slide intersecting" the line of movement of theother slide, means connecting the-two crank-pins each with'onc of theslides,- and means connecting the cra'nlnpin of the first shaftwithb'oth 7 casing, drive shaft having diametrically Slides. e :7 v w -511 a'device of thenature disclosed, a

oppose-d crank elements,--a driven shaft havdiametrically opposed crankelements, a pa r of opposed-sl des, a second pair of opposed slides, alloflsaid slides carried by the casing so as totravel substantially raedial towards and from the axes ofthe shafts, witlreach slide travelingreversely-to its opposed slide, and. means connecting leach crankelementtowtwo angularly' adjacent slides, the drive shaft-crank elementsconnectingw th diametrically opposite pairs of said slides and thedriven shaft connect-Q ing likewise, with diametrically opposite pairsof said slides whichlastinamed pairs include one of each of the. pairsof slides connected with theydrive shaft. I

'4. In a device of the nature disclosed, a casing, a shaft having acrank element, a second shaft substantially aligned withthe first namedshaft, and having two diametrically opposed crank" elements, slidescarried by the casing and mounted so as to.

travel substantially radially towards and from the axes of the shafts,the line of travel of one slide being substantially at right angles tothe line of travel of the other slide,

means connecting the two crank elements each with one of the slides,means connecting the crank element of the, first shaft with both sl des,and means maintaining the casing against rotation to cause a rever ofone shaft relative to the other.

5. Ina device of the naturedisclosed, a

1 casing, a shaft having'a crank pima second slmftv substantiallyaligned with the first named shaft, and having two diametrically opposedcrank-pins, two slides carried by the casing. and mounted so as totravel substantially radially towards andfrom the shaft relative to theother r 6. In a device ofthe nature (llSQlOSGfLIL casing, adrive shafthaving diametricallyopposed crankelements, a driven'shaft'hav- V ingdiametrically opposed crank elements, a

pair of opposed slides. a second pairof op-r posed. slides, all ofsaidslides earned by the se rotation I casing'iia'nd travelingtransversely towards 1 and from the' aXia-l'plane of the shafts, witheachslide traveling reversely to its opposed slide, means-connectingeach crank element "to'twoangularly adjacent slides, the drive shaftcranklelements connectingwith diametrically opposite pairs of saidslides and the driven shaft'connecting' likewise 'with diametrically.opposite pairs of said slides whlchdast named-pairs'ginclude one of eachof the pairs of slides connected withfithe drive shafaand meansmaintaining tation of oneshaftrelative to the other.

L7.*In a. device of the nature disclosed,a

casing, a shaft having a'crank element, a

secondshaftsubstantially aligned with the first named shaft,'andhavingatwo diametriq cally opposed crankelements, slides carried by thecasing and movable substantially as dlally so .asto travela transverselytowards "andfrom the aXesof the'sha'fts, the'lineof movement ofone slidebeing substantiallyat the caslngagainstrotatlon to cause a reverse r'oasI right angles to theline of movement of'the "other slide, meansconnecting the twocrank elements each with one of the slides, meansconnecting the crank element of theifirst' sh-aft wlth both slides,means maintaining the'casing against rotation to cause a reverse 19rotation of one, shaftrelative to -the other and releasable to permit arotationof the.

casing and means for connecting the casing to one'shaft at will toprovide a direct driv-- ingconnection betweenthe two shafts.

8. In, a device of the nature disclosed, av casing,'a shaft having acrank-pin, asecond shaft substantially aligned with the first namedshaft, and having two diametrically opposed crank-pins, two slidescarried by the casing andniovable substantially radi with oneofthejslides, means connecting the crank-pinofithe firstshaft'withbothslide y 7 means for malntalnlng the casing" against rotationat willto, cause. a reverse rotation of oneishaft relative to the otherjandreleas-f able to permit a rotation of the casing, and

means for connecting the casing'to one'sliaft tion between the twoshafts 9; In: a deviceof'thenature disclosed, a 'c"asing, f drive shafthavingdiametrically opposed crank elements, a driven shaft having.diametrically opposed crankxele ments g 'four'slidescarried in opposedpairs by the 2 j casing; and traveling transversely towards m and fromthe 'axialplane of the shaftawith j each slide traveling reversely toitsopposed 105 V soas to traveltransversel'y towards and 1 from thea'xialplane of the shafts, each slide 7 moving in a plane substantially atr'ight anglee-to the planeofmovement of the other,

means connecting the two crank-pins each' at will to provide a directdriving connec- T 7 v slide, means connecting eachcrank element 6ito'twoangularly adjacent slides, the drive shaft crank elements connectng wi h d smetrically opposite pair's of said slides and the ClIlVQIl'shaft-connecting likewise Wit-h other and releasable to permit arotation of the casing, and means for connecting the casdiametricallyopposite pairs of said slides which lastllitTDGCi' pairs include one ofeach of the pairs of slides connected With the drive shaft, means formaintaining the casing against rotation at will to cause a re-' verserotation oi one'sh-aft relative toz the ing at will to one shaft toprovide-a dire-[3c V drivine: 'connectionsbetween' the twoshafts.

10.-:In-a' device of the nature: disclosed; a

driving shat't. a driven shaft in substantial nieans'yfor guiding thesainelin a 'snhstan-Q alignment ivitli tlie driving shaft, a. pair ofdiametrically oppositely disposed slides M tially radial direction toand' from the axis of the shafts',;.nieans fordriving the slides to In adevice of tlie nature disclosed a dr ving shaft, a driven shaft insubstantial alignment with the driving haft, a pair of diametricallyoppositely disposed slides,

means for guiding the same to slide to and from the axes in asubstantially radial direction, said driving shaft having a pair ofdiametrically opposite crank pins, a coin necting rod connecting each ofsaid crank pins with its corresponding slide, whereby the 'ci'anl ]iinsoperate to move each slide in" an opposite direction to the other slideat i y given instant, a pair of diametrically opposite ci'anlrpinscarried by the driven shaft, a connecting rod connecting each of thelast named crank pins with its corre- SPQIlCllIlg'fSllClQ and operatingto drive the driven shaft in a reverse direction from the "drivingshattiSigned at-Los Angelea California, this ltth day of April, .1922. i I 1 vSTEVE CRESSEY. "Witnesses: U CLARENCE B. FOSTER,

'L. BELLE WVEAVEB.

